Kim, Du-Han
Bae, Ki-Cheor
Kim, Dong-Wan
Choi, Byung-Chan
Text and Data Mining valid from 2019-09-18
Version of Record valid from 2019-09-18
Article History
Received: 15 May 2019
Accepted: 22 August 2019
First Online: 18 September 2019
Competing interests
: The authors declare that they have no competing interests.